A massive Antonov An-124 Ruslan cargo plane was spotted flying over Kyiv, Ukraine, sparking surprise and speculation.

Two Chinese planes came dangerously close to a mid-air collision over Siberia after an Air China passenger jet climbed without clearance, according to flight data and leaked cockpit recordings.

Officials began using it as a storage facility for bombers and cargo planes after World War II because of Tucson's dry climate, which slows the corrosion of aircraft.